I play Runescape and I want to make a tool that people can use to make profit in the game.

My problem is that I am not sure exactly how do use a command to pull data text from a div element. The command is =ImportHtml. I'm trying to get the contents of the div element is #GEPCalcResult1 from the page http://runescape.wikia.com/wiki/Prayer_potion. The div contains an item's price, and it's updated every 24hrs. I want to put it on spread sheets and have them calculate profit automatically. Please help me? If you could show me how do as well do .class elements too it would greatly be appreciated!